396 Mr. A. R. Wallace on 



9, Thestias LiideJdngn, Vollenhoven. 

 Thestius Ludck'mgii, Voll. Tijd. v. Ent. iii. p. 125 ; Mon. Pier. 



p. 49, pi. 5,L G, <i. 

 ILib. — Sumatra (Leyden Museum). 

 A distinct species, allied to T. pirenassa. 



Iphias, Boisduval. 

 This genus consists of the largest and most gaudily-coloured 

 PieridcB, and is especially characteristic of the Malayan Islands. 

 For more than eighty years it had consisted of two species only, 

 when I had the good fortune to discover two more in the Moluccas, 

 and the group now comprises six sufficiently distinct species, all 

 of which are found in the Malay Archipelago, one of them only 

 ranging out of it over all tropical Asia. The Moluccas and Timor 

 are the eastern limits of the group, no specimen halving yet been 

 found in New Guinea. 



1. l2^Jnas glaucippe, Linnaeus. 



Papilio glaucippe, Lin. S. N. ii. p. 762 ; Cr. \6l A, B, C. Iphias 

 glaiicippe, Bd. Sp. Gen. p. 596. 



Hah.— (Type). — India, Sumatra, Celebes (Coll. Wall., B. M.). 

 (Var.). — Java, Flores, Timor, Philippine Is. (Coll. Wall., 

 B. M.). 



This species has a wide range and varies slightly in each localitj' 

 in form, size, and colouration. These variations may be best 

 grouped under two forms, — the type, which has ihe orange patch 

 bordered with black on the inner side, — the variety which has little 

 or no black separating the orange from the white of the wings. 

 The Celebes specimens are very large and have very acutely- 

 pointed wings. The Celebes form has most black, the Timor form 

 least; and if the species became extinct over the remainder of its 

 range, these two would undoubtedly be considered distinct, since 

 they differ constantly both in form and markings. 



2. Iphias borneensis, n. sp. 



Tph'ias glaucippe, var., Wall. Journ. Ent. vol. 2, p. 3. 



Male. — Like /. glaucippe, but the orange apical patch much 



reduced, leaving a wide border all roimd it, which at the apex 



encroaches on the black spots ; lower wings sometimes with a 



submarginal row of small spots. 



Female. — Like /. glaticippe, but the apical patch small and 



